Mailman 3 March 2006 - Tkinter-discuss

tkFont issue; what patch will fly?
by Russell E. Owen March 29, 2006

March 29, 2006

Tkinter's support for tk named fonts has problems. tk named fonts allow one to change the font of a set of widgets all at the same time, e.g. to support user-specified fonts. One can create a tk named font, add an entry to the tk option database, and then new widgets of the appropriate type will automatically use that named font (by default). Very handy for user preferences! The Tkinter interface to tk named fonts is the tkFont.Font object. Originally tkFont.Font objects could create tk named fonts, but not visa versa (e.g. given a widget, you could not get a tkFont.Font representation of the named font it used), which was clumsy. I submitted a patch awhile ago that was *partly* implemented to fix this. Unfortunately, the part left out resulted in a mess that I'd like to clean up. The problem is garbage collection. At present all tkFont.Font objects delete their associated tk named font when they are garbage-collected. This was already a pain when the tkFont.Font object created the tk named font (since one had to keep the tkFont.Font object around even if one had no more use for it) but it's a disaster when the tkFont.Font is just a copy of an existing tk named font. My originally proposed solution was to never have tkFont.Font objects delete tk named fonts. I still think this is the best thing to do because one can create a tk named font and add it to the tk options database, then throw it away. To manipulate it later, just create a widget of the appropriate type, get a tkFont.Font object for its font, change that and throw it away again. However, that does mean a change in Tkinter behavior and a possible memory leak if somebody was mad enough to create hordes of named fonts, only to want to get rid of them later (I can't imagine a sane reason for doing that). An alternative is to have tkFont.Font only auto-delete the named font if the tkFont.Font was not a copy of an existing named font. Then at least one can safely get that copy and throw it away without hosing one's ability to manipulate widgets. I'll happily submit either patch (or some other if folks feel another alternative is better). What do you think? What will fly? -- Russell

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tag_bind
by geon March 29, 2006

March 29, 2006

Hi, On a canvas I would like to bind my "player" with arrows keys, but must be there something wrong, cause it is not able to bind it. This is my code: from Tkinter import * def move(what): print what.keycode master=Tk() myCanvas=Canvas(master, bg="white") pos=(20,20,30,30) player=myCanvas.create_oval(pos, fill="blue") myCanvas.focus(player) myCanvas.tag_bind(player, "<Up>", move) myCanvas.pack() mainloop() Thank you for your help. -- geon volume doprava.

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Need help with a text + scrollbar widget and expansion
by Mannequin* March 22, 2006

March 22, 2006

Hi all, I'm new to the list, and I have a question about how I can get a text + scrollbar widget to expand properly in their frame. I'll first give you the sample code, then I'll link to images of the problem. ********************************************************************* from Tkinter import * APP_NAME = "Spurgeon" APP_VERSION = "0.10" BIBLE_BOOKS = ["Genesis", "Exodus", "Leviticus", "Numbers"] class Spurgeon (Frame): """Hopefully a class to create the Tkinter interface""" def __init__ (self, parent = None): """Creates main window and widgets""" self.root = Tk () self.root.title (APP_NAME + ' ' + APP_VERSION) self.root.config (borderwidth = 3) Frame.__init__ (self, parent) self.pack (fill = "both", expand = "yes") self.make_widgets () def make_widgets (self): """Create the widgets for the main window""" # Create the main menu self.mainmenu = Menu (self.root) # Create the File menu self.file_menu = Menu (self.mainmenu, tearoff = 0) self.file_menu.add_command (label = "Open", underline = 0) self.file_menu.add_separator () self.file_menu.add_command (label = "Quit", underline = 0, command = self.root.quit) self.mainmenu.add_cascade (label = "File", menu = self.file_menu, underline = 0) # Create the Edit menu self.edit_menu = Menu (self.mainmenu, tearoff = 0) self.edit_menu.add_command (label = "Cut", underline = 2) self.edit_menu.add_command (label = "Copy", underline = 0) self.edit_menu.add_command (label = "Paste", underline = 0) self.edit_menu.add_command (label = "Delete", underline = 0) self.mainmenu.add_cascade (label = "Edit", menu = self.edit_menu, underline = 0) # Create the Help menu self.help_menu = Menu (self.mainmenu, tearoff = 0) self.help_menu.add_command (label = "About", underline = 0) self.mainmenu.add_cascade (label = "Help", menu = self.help_menu, underline = 0) # Display the main menu self.root.config (menu = self.mainmenu) # Create the left frame self.tool_frame = Frame (self, borderwidth = 2) self.tool_frame.pack (side = LEFT, anchor = NW) Label (self.tool_frame, text = "Left frame").pack () # Create the right frame self.view_frame = Frame (self, borderwidth = 2) self.view_frame.pack (side = RIGHT, expand = "yes", fill = "both") # Create the area where the Bible is viewed from self.bible_scroll = Scrollbar (self.view_frame) self.bible_view = Text (self.view_frame, relief = SUNKEN) self.bible_scroll.config (command = self.bible_view.yview) self.bible_view.config (yscrollcommand = self.bible_scroll.set) self.bible_view.pack (side = LEFT, fill = "both", expand = "yes") self.bible_scroll.pack (side = RIGHT, fill = Y, expand = "yes", anchor = W) if (__name__ == "__main__"): a = Spurgeon () a.mainloop () ********************************************************************* Now, if you run this, you'll notice that when you expand the window horizontally ( <---> ) that the text + scrollbar widget doesn't expand with the window. Here is a screenshot of the problem to illustrate what I'm talking about: <http://mannequin.invigorated.org/images/problem.png> I hope I've given enough information here to be helpful. By the way, is there anyway to enhance the look of the Tkinter widgets under Linux using what comes standard with Python. I'm trying to stay as standard as I possibly can. Thanks! -M.

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Re: [Tkinter-discuss] Tkinter-discuss Digest, Vol 25, Issue 7
by Harlin Seritt March 21, 2006

March 21, 2006

Hi Mr. M.- Change this line: self.bible_scroll.pack (side = RIGHT, fill = Y, expand = "yes", anchor = W) to this: self.bible_scroll.pack (side = RIGHT, fill = Y, anchor = W) Remember that not everything needs to expand! Good luck with your project! If you get a chance, I'd like to know more offline (away from this list) about your app. Thanks, Harlin Seritt http://www.seritt.org tkinter-discuss-request(a)python.org wrote: Send Tkinter-discuss mailing list submissions to tkinter-discuss(a)python.org To subscribe or unsubscribe via the World Wide Web, visit http://mail.python.org/mailman/listinfo/tkinter-discuss or, via email, send a message with subject or body 'help' to tkinter-discuss-request(a)python.org You can reach the person managing the list at tkinter-discuss-owner(a)python.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Tkinter-discuss digest..." Today's Topics: 1. Need help with a text + scrollbar widget and expansion (Mannequin*) ---------------------------------------------------------------------- Message: 1 Date: Mon, 20 Mar 2006 12:10:41 -0600 From: Mannequin* Subject: [Tkinter-discuss] Need help with a text + scrollbar widget and expansion To: Tkinter Discuss Message-ID: <441EF021.2010101(a)invigorated.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi all, I'm new to the list, and I have a question about how I can get a text + scrollbar widget to expand properly in their frame. I'll first give you the sample code, then I'll link to images of the problem. ********************************************************************* from Tkinter import * APP_NAME = "Spurgeon" APP_VERSION = "0.10" BIBLE_BOOKS = ["Genesis", "Exodus", "Leviticus", "Numbers"] class Spurgeon (Frame): """Hopefully a class to create the Tkinter interface""" def __init__ (self, parent = None): """Creates main window and widgets""" self.root = Tk () self.root.title (APP_NAME + ' ' + APP_VERSION) self.root.config (borderwidth = 3) Frame.__init__ (self, parent) self.pack (fill = "both", expand = "yes") self.make_widgets () def make_widgets (self): """Create the widgets for the main window""" # Create the main menu self.mainmenu = Menu (self.root) # Create the File menu self.file_menu = Menu (self.mainmenu, tearoff = 0) self.file_menu.add_command (label = "Open", underline = 0) self.file_menu.add_separator () self.file_menu.add_command (label = "Quit", underline = 0, command = self.root.quit) self.mainmenu.add_cascade (label = "File", menu = self.file_menu, underline = 0) # Create the Edit menu self.edit_menu = Menu (self.mainmenu, tearoff = 0) self.edit_menu.add_command (label = "Cut", underline = 2) self.edit_menu.add_command (label = "Copy", underline = 0) self.edit_menu.add_command (label = "Paste", underline = 0) self.edit_menu.add_command (label = "Delete", underline = 0) self.mainmenu.add_cascade (label = "Edit", menu = self.edit_menu, underline = 0) # Create the Help menu self.help_menu = Menu (self.mainmenu, tearoff = 0) self.help_menu.add_command (label = "About", underline = 0) self.mainmenu.add_cascade (label = "Help", menu = self.help_menu, underline = 0) # Display the main menu self.root.config (menu = self.mainmenu) # Create the left frame self.tool_frame = Frame (self, borderwidth = 2) self.tool_frame.pack (side = LEFT, anchor = NW) Label (self.tool_frame, text = "Left frame").pack () # Create the right frame self.view_frame = Frame (self, borderwidth = 2) self.view_frame.pack (side = RIGHT, expand = "yes", fill = "both") # Create the area where the Bible is viewed from self.bible_scroll = Scrollbar (self.view_frame) self.bible_view = Text (self.view_frame, relief = SUNKEN) self.bible_scroll.config (command = self.bible_view.yview) self.bible_view.config (yscrollcommand = self.bible_scroll.set) self.bible_view.pack (side = LEFT, fill = "both", expand = "yes") self.bible_scroll.pack (side = RIGHT, fill = Y, expand = "yes", anchor = W) if (__name__ == "__main__"): a = Spurgeon () a.mainloop () ********************************************************************* Now, if you run this, you'll notice that when you expand the window horizontally ( <---> ) that the text + scrollbar widget doesn't expand with the window. Here is a screenshot of the problem to illustrate what I'm talking about: I hope I've given enough information here to be helpful. By the way, is there anyway to enhance the look of the Tkinter widgets under Linux using what comes standard with Python. I'm trying to stay as standard as I possibly can. Thanks! -M. ------------------------------ _______________________________________________ Tkinter-discuss mailing list Tkinter-discuss(a)python.org http://mail.python.org/mailman/listinfo/tkinter-discuss End of Tkinter-discuss Digest, Vol 25, Issue 7 ********************************************** --------------------------------- Yahoo! Mail Bring photos to life! New PhotoMail makes sharing a breeze.

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Trouble quitting a Tkinter app on Windows
by Russell E. Owen March 17, 2006

March 17, 2006

I have a Python/Tkinter application that runs on various platforms. When the user selects "quit", I call root.quit() or sys.exit(0) (newer vs. older version of the code). This works on all platforms except Windows. On Windows when the user quits (which calls quit on the root toplevel), it always exits with the following error dialog: This application has requested the Runtime to terminate it in an unusual way. Please contact the application"s support team for more information. A google search shows that others have had this problem -- especially PMW users -- but nobody seems to understand why. I posted to the tk newsgroup and was told that tk users don't see this problem, so it may be a Tkinter bug. One user suggested calling root.destroy() first. That does work but it takes a surprisingly long time as each toplevel in turn is destroyed. (It is nearly instantaneous on other platforms, but also unnecessary). My application (a telescope control GUI) has many toplevels, uses tkFont objects to manage display fonts and has a few background tasks (that use "after"). I don't know if any of these are relevant, but I certainly get the feeling that simpler applications don't show the problem. Any ideas? Should I file a Tkinter bug report? -- Russell

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question on displaying inserted text in widget 'Text'
by V H March 17, 2006

March 17, 2006

Hello, The function what I implemented takes 30 seconds. Before running it I want to give some message to user by displaying them in the widget 'Text'. Seems it's not useful because the message are always displayed after the excution. Could you help me to resolve it? Thanks a lot. best regards, Weining The sample file is as following: from Tkinter import * import time class one: def __init__(self, master): self.text=None frame = Frame(master) button = Button(tk,text='start', command=self.execute) button.pack() self.text = Text(frame,width=30,height=10) self.text.pack() frame.pack() def addMessage(self,message): self.text.insert(END,self.getCurrentTime()) self.text.insert(END,message) self.text.insert(END, '\n') def getCurrentTime(self): now = time.localtime(time.time()) year, month, day, hour, minute, second, weekday, yearday, daylight = now return "%02d:%02d:%02d" % (hour, minute, second) def execute(self): self.addMessage(' Start testing') for i in range(10000): for j in range (2000): i*j self.addMessage(' Finish testing') tk = Tk() o = one(tk) tk.mainloop() _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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Tix: binding
by hk＠pop.ms March 15, 2006

March 15, 2006

I am looking at Tix and I am stuck with what seems to be a simple problem: I want to bind the cancel buttom of a ExFileSelectBox to a routine in my class, but can not make it work. I guess the problem is the same for any binding of tix sub-widgets, so if someone could send some sample code. >>> import Tix >>> root = Tix.Tk() >>> box = Tix.ExFileSelectBox(root) >>> print box.subwidget(name='cancel') .11827520.bf.cancel #so the sub-widget cancel buttom is there But how to bind it ? >>> box.cancel(command = lambda a,b : a+b ) Traceback (most recent call last): File "<pyshell#12>", line 1, in ? box.cancel(command = lambda a,b : a+b ) AttributeError: _dummyButton instance has no __call__ method Or >>> box.subwidget(name='cancel' , command = lambda a,b : a+b ) Traceback (most recent call last): File "<pyshell#13>", line 1, in ? box.subwidget(name='cancel' , command = lambda a,b : a+b ) TypeError: subwidget() got an unexpected keyword argument 'command' So, it seems I can not bind to command, but what then ? >From the Tix docu I thought the buttoms are normal Tkinter widgets ? -- Harm

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question on scalable frame
by V H March 7, 2006

March 7, 2006

Hello, I am using Tkinter to create a scalable/expandable frame and using pack() to manage it. On the frame there are several dynamically created sub-frames. The top level frame is expanded automatically with the increasing number of sub-frames. But after I adjust the size of the top-level frame using mouse, it cannot expand automatically. Is it normal? Or how can I resolve it? Thanks. regards, Weining _________________________________________________________________ Don't just search. Find. Check out the new MSN Search! http://search.msn.click-url.com/go/onm00200636ave/direct/01/

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Accessing tables through Python (ActivePython 2.3)
by rkundu＠ouray.cudenver.edu March 3, 2006

March 3, 2006

I am trying to read the field names from a dbf table using python. Is there any way to do this? I tried using PyTables and also PyIMAPITable but no luck. I also tried sending a dispatch "DAO.DBEngine", but failed. Any suggestions will be appreciated. Thank you, Reema

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Re: [Tkinter-discuss] How to launch a dialog when app is started?
by Harlin Seritt March 3, 2006

March 3, 2006

Hi Russell, This may be quite different but if I understand the requirements, you can try this: from Tkinter import * import tkFileDialog class app: def __init__(self, master): master.title('Hello') Button(master, text='Button').pack() tkFileDialog.askopenfilename() if __name__ == '__main__': root = Tk() app = app(root) root.mainloop() Harlin Seritt tkinter-discuss-request(a)python.org wrote: Send Tkinter-discuss mailing list submissions to tkinter-discuss(a)python.org To subscribe or unsubscribe via the World Wide Web, visit http://mail.python.org/mailman/listinfo/tkinter-discuss or, via email, send a message with subject or body 'help' to tkinter-discuss-request(a)python.org You can reach the person managing the list at tkinter-discuss-owner(a)python.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Tkinter-discuss digest..." Today's Topics: 1. How to launch a dialog when app is started? (Russell Blau) 2. Re: How to launch a dialog when app is started? (jepler(a)unpythonic.net) ---------------------------------------------------------------------- Message: 1 Date: Thu, 2 Mar 2006 16:14:54 -0500 From: "Russell Blau" Subject: [Tkinter-discuss] How to launch a dialog when app is started? To: tkinter-discuss(a)python.org Message-ID: I am trying to write a Tkinter application that will automatically display a particular dialog box on top of the application when it is initialized. (Like a word processor opening a "File Open" dialog as the first thing that happens when you enter the application.) How do I do this? I have a method that invokes the dialog box, but I cannot call it until after my app's mainloop has started; but once the mainloop has started, I can't call it from the program, either! I'm sure I'm overlooking something obvious here. Example (skeleton) code: from Tkinter import * class NewPageDialog(tkSimpleDialog.Dialog): def body(self, master, title="Select Target"): Label(master, text="Target page:").grid(row=0) self.targetpage = Entry(master) self.targetpage.grid(row=0, column=1) return self.targetpage def validate(self): return True def apply(self): pass class GuiApplication(Frame): def __init__(self, master): Frame.__init__(self, master) def newpage(self): n = NewPageDialog(self) self.targetpage = n.targetpage.get() if __name__ == "__main__": app = GuiApplication(Tk()) # do something here to cause GuiApplication to invoke newpage() method when it starts app.mainloop() ------------------------------ Message: 2 Date: Thu, 2 Mar 2006 15:43:00 -0600 From: jepler(a)unpythonic.net Subject: Re: [Tkinter-discuss] How to launch a dialog when app is started? To: Russell Blau Cc: tkinter-discuss(a)python.org Message-ID: <20060302214300.GC16093(a)unpythonic.net> Content-Type: text/plain; charset=us-ascii You might try writing app.after_idle(app.newpage) or simply: app = GuiApplication(Tk()) app.newpage() app.mainloop() except that this will always enter mainloop after newpage is called, which may not be what you desire. Jeff ------------------------------ _______________________________________________ Tkinter-discuss mailing list Tkinter-discuss(a)python.org http://mail.python.org/mailman/listinfo/tkinter-discuss End of Tkinter-discuss Digest, Vol 25, Issue 1 ********************************************** --------------------------------- Yahoo! Mail Bring photos to life! New PhotoMail makes sharing a breeze.

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